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In order to control the key point of accidents during bridge construction, a number of major risk factors are recognized from the point of the insecure elements of human beings and the insecure status of objects, and a risk assessment index system of bridge construction stage is created based on these risk factors; so given the uncertainty and fuzziness of the risk factors, the risk assessment of the bridge construction stage based on FCE is created, this model determines the weight and the membership of the risk factors according to risk occurrence probability and risk loss; by the end, for Taizhou Bridge under construction, this article determines its risk factors in construction stage, and uses this model to judge its risk level. It is shown that the model can assess the risk of bridge construction stage with relative accuracy. [ABSTRACT FROM PUBLISHER]

This paper investigates temperature distribution in concrete box girder which is prefabricated in the precast yard, under the influence of diurnal change of temperature. One concrete box girder in the precast yard of Liutiaohe Bridge is experimental subject. Observation data of four days were collected by embedded sensors and non-contact infrared thermo detector. And regression analysis is used to study observation data by using the nonlinear least squares method. Experimental results show that difference of transverse temperature gradient is large in outboard web, bottom slab. The difference of vertical temperature gradient is also big at top plate. Furthermore, there mainly shows vertical negative differential temperature in concrete box girder. And a regression equation is proposed. [ABSTRACT FROM PUBLISHER]

The basis of design for complex structures like suspension bridges is reviewed. Specific attention is devoted to seismic action and to the performance required and to the connected structural analysis. Uncertainty is specially addressed by probabilistic and soft-computing techniques. The paper makes punctual reference to the work end the experience developed during the last years for the re-design of the Messina Strait Bridge. [ABSTRACT FROM AUTHOR]